BLM31KN471BH1L

Chip Ferrite Bead Overview

The Murata BLM31KN471BH1L is a single-line ferrite bead chip designed for power line noise suppression. It features an impedance of 470 Ohms at 100 MHz and supports a maximum DC current of 2.9 A. The component has a maximum DC resistance of 38 mOhms and operates within a temperature range of -55°C to +125°C. It utilizes a 1206 (3216 metric) surface mount package with dimensions of 3.2 mm length, 1.6 mm width, and 1.6 mm height.

Chip Ferrite Bead Feature Summary

• Provides high-frequency noise attenuation on power rails through significant impedance characteristics.
• Engineered for automotive applications with AEC-Q200 qualification standards.
• Supports high current handling capabilities suitable for demanding power supply lines.

Chip Ferrite Bead Applications

• Automotive electronic systems requiring EMI suppression
• High-current power rail filtering in industrial equipment
• Noise reduction in automotive infotainment and control units

Chip Ferrite Bead Procurement Notes

Verify the specific suffix BH1L against official Murata documentation to confirm impedance tolerance and packaging details. Ensure the procurement source provides valid RoHS compliance certificates and AEC-Q200 qualification records. Cross-reference the manufacturer part number with authorized distributor lists to avoid counterfeit components. Confirm that the delivered goods match the specified 1206 package dimensions and electrical ratings.

Chip Ferrite Bead Selection Notes

Select this component when designing circuits requiring robust noise suppression on high-current power lines. The 470 Ohm impedance at 100 MHz offers effective attenuation for common switching frequencies. The 2.9 A current rating ensures reliable operation without excessive thermal rise. Consider the 1206 footprint for board space optimization while maintaining high power handling capacity compared to smaller packages.

Chip Ferrite Bead Part Context

This component belongs to the Murata BLM31KN series, which specializes in high-rated current SMD ferrite beads. The series is specifically targeted at automotive applications, including AI servers and advanced driver assistance systems. These beads are designed to meet stringent automotive reliability standards while providing efficient electromagnetic interference filtering for sensitive electronic components.

Chip Ferrite Bead Replacement Considerations

Direct substitutes include BLM31KN471SZ1L and BLM31KN471SN1L from the same manufacturer. Verify that alternative parts maintain identical impedance values, current ratings, and package dimensions. Ensure replacement components also hold AEC-Q200 certification if used in automotive contexts. Check datasheet parameters for any differences in DC resistance or temperature coefficients.